hamburger casserole recipe

1 pound ground beef 2 (15 ounce) cans tomato sauce 1 teaspoon white sugar, or to taste 1 teaspoon garlic salt, or to taste 1 teaspoon salt, or to taste 1 (8 ounce) package egg noodles 1 cup sour cream 3 ounces cream cheese, softened 1 large white onion, finely diced ½ cup shredded sharp Cheddar cheese, or more to taste